This guide explains how to centrally manage Gmail signatures across your organization using the Xink API integration with Google Workspace. It includes step-by-step instructions for configuring API permissions and connecting the Xink portal.
✅ Key Features
- You can manage Gmail signatures centrally with a Google Workspace account.
- Users see their signature instantly when they click Compose in Gmail.
- Signatures can be updated for users in any Organizational Unit or domain within the same Google Workspace tenant.
- Enterprise customers with multiple domains can allocate licenses across separate Xink accounts.
No rerouting of your company emails!
This integration ensures privacy and transparency — no email rerouting involved.
Feature Availability (API Method)
| The API method | Supported? |
| New email signature | Yes |
| Reply email signature | Yes |
| Unattended | Yes |
| Overwrite user-created | Yes |
| Gmail for Android | Yes |
| Gmail for iOS | Yes |
The API Method
Xink updates Gmail signatures within one hour. After configuration, allow up to an hour for the signature to appear in Gmail.
Step 1 – Google Admin Console Configuration
You grant Xink the required Google API permission to inject the user's signature through the Google API.
With the credentials used to administer your Google accounts, sign in to the Google Admin console at https://admin.google.com.
- Go to Security > API Controls
- Under the Domain-Wide Delegation section, click Manage domain-wide delegation.
- Click Add New. Fill in the following:
Client ID:27708099835-fmptu081sib9tn8v35ksjmc0knukd3mu.apps.googleusercontent.com
OAuth Scopes:https://www.googleapis.com/auth/gmail.settings.basic,https://www.googleapis.com/auth/gmail.settings.sharing
Note: Xink requires these Gmail API scopes. Learn more
- Click Authorize. You will now see the entry added to the list.
Step 2 – Xink Portal Configuration
- Log in to the Xink portal and go to:
Preferences > Integration > Google Workspace
Click Enable, enter your Google Workspace admin account (with at least User and Group read permissions), and click Save.
- Wait one hour, log in to Gmail and click Compose to verify that the Xink signature is applied.
